CDRIVER-1982 fix ifdef for strerror_s with mingw
CDRIVER-1982 fix ifdef for strerror_s with mingw

ajdavis/libbson,rcsanchez97/libbson,ajdavis/libbson,paulmelnikow/libbson,mongodb/libbson,mapr/libbson,rcsanchez97/libbson,bjori/libbson,mongodb/libbson,bjori/libbson,rcsanchez97/libbson,ajdavis/libbson,mapr/libbson,paulmelnikow/libbson,mapr/libbson,paulmelnikow/libbson,paulmelnikow/libbson,mongodb/libbson,paulmelnikow/libbson,bjori/libbson